TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Study Regarding Biodiesel Influence on Lubricity of Diesel Fuel
(Studiu privind influenta Biodieselului asupra lubricităţii combustibilului Diesel)
Vol LXII • No. 3A/2010
Dorin Stanica-Ezeanu, Violeta Frangulea
Universitatea Petrol-Gaze din Ploiesti, Bvd. Bucuresti, nr. 39. 100680-Ploiesti, Romania
e-mail: dorsta@upg-ploiesti.ro

 Keywords   lubricity, Biodiesel, Diesel fuels.

 Abstract
The new specifications of Diesel fuels involve a variable content of biofuels in order to reduce the CO2 emissions. Biofuels have very good burning characteristics, but also some disadvantages. The ultra lo sulfur gas oils are new mixing components of Diesel fuels and despite their very good characteristics they have a lower lubricity than sulfurous gas oils. This characteristic is very important for the new cars because the fuel pump is lubricated by fuel itself and, therefore, it must be corrected by additives, but is better when a mixing component makes this work. In this paper we present the results of the study regarding the lubricity of different mixtures between ultra low sulfur gas oil and Biodiesel, by using a lubricating test system HFR2. These results show the synergic effect of Biodiesel - gas oil mixture which presents a better lubricity than each component. As a conclusion we have to recommend Biodiesel as lubricating component of Diesel fuels.

 Rezumat
Noile specificaţii ale combustibililor Diesel implica un conţinut variabil de biocombustibil pentru a reduce emisiile de CO2. Biocombustibilii au caracteristici de ardere foarte bune, dar şi unele dezavantaje. Motorinele cu conţinut foarte redus de sulf sunt componenţi de amestec buni pentru combustibilii Diesel, dar deşi au caracteristici foarte bune, prezinta o lubricitate mai mica decât motorinele cu sulf. Această caracteristică este foarte importantă pentru autoturismele noi deoarece pompa de combustibile este unsă de combustibilul însuşi şi, prin urmare, acesta trebuie corectat cu aditivi, dar este mai bine când un component de amestec face acest lucru. In această lucrare se prezintă rezultatele studiului privind lubricitatea diferitelor amestecuri de motorină cu conţinut redus de sulf şi Biodiesel, folosind un sistem HFR2 de testare a lubricităţii. Rezultatele arată efectul sinergic al amestecurilor Biodiesel-motorină, care prezintă lubricităţi superioare faţă de cei doi componenţi de amestec. Ca o concluzie, noi vrem să recomandăm folosirea Biodieselului ca şi component de majorare a lubricităţii combustibililor Diesel.



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